Malicious PDF — malware analysis report

Static analysis result for SHA-256 9297fe2ebcdeced3…

MALICIOUS

PDF

69.6 KB Created: 2021-09-24 03:14:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 204dcb5835516aa8d2f05155163d3538 SHA-1: 4a822e1ac6ca4c4fc4d7d4c0813ae47bda118ac6 SHA-256: 9297fe2ebcdeced3a80ae42cb5f80e3c4dc33494b50ddb08a79bc5645db508e8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, suggesting it functions as a link farm or phishing lure, directing users to potentially harmful content. The presence of PDF-specific heuristics like PDF_SEO_DISPOSABLE_LINK_FARM further supports this, indicating a deliberate attempt to obscure or distribute malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://garglob.ru/uplcv?utm_term=java+game+emulator+for+android+apk PDF link annotation
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/55157082533.pdfIn PDF document text
    • http://sonsuadogo.org/Images_upload/files/81264121291.pdfIn PDF document text
    • http://centrons.com/uploaded/file/11930285826135a67431063.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f3e61aaf10---wipukafore.pdfIn PDF document text
    • http://vertracapital.com/uploads/files/kinodopufokosajovarurolor.pdfIn PDF document text
    • http://hai-bi.com/uploads/files/202109090120536835.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/tuxolegokug.pdfIn PDF document text
    • https://leifs-auto.dk/images/file/7079305513.pdfIn PDF document text
    • https://b2bircruise.travflex.com/bot/ckfinder/uf/files/45613422853.pdfIn PDF document text
    • http://nabisori.com/userfiles/file/muzuwuxu.pdfIn PDF document text
    • http://fcraregistration.com/UploadedData/file/48426721045.pdfIn PDF document text
    • http://tieuhocsongphuong.hoaiduc.edu.vn/ckfinder/userfiles/files/zisaguvevegeko.pdfIn PDF document text
    • https://officialbacknumber.org/editor_up/94365312391.pdfIn PDF document text
    • http://chenruichem.com/upload/files/67340616711.pdfIn PDF document text
    • http://k12kos.com/ckfinder/userfiles/files/nezugipor.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/80022241205.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614cf1e41cf69---zopikawudisowabor.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/67725206829.pdfIn PDF document text
    • http://teamhead.net/userfiles/file/xivariruvaxava.pdfIn PDF document text
    • https://betsin.org/userfiles/files/kasobivopawejinisiri.pdfIn PDF document text
    • https://selispin.com/calisma2/files/uploads/vefajumivafilurimi.pdfIn PDF document text
    • http://marktoby.com/akram/know_news/admin/userfiles/file/tuzemukefilazate.pdfIn PDF document text
    • https://mandarinusa.com/userfiles/file/1630468979.pdfIn PDF document text
    • https://silverlabpupsforsale.com/userfiles/files/wiganavetivunoluwivava.pdfIn PDF document text
    • http://daehwa.info/uploaded/file/xogurito.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1A5 15080 bytes
SHA-256: a9cebc42f25794e8a62ef86697d6923e02cf8325c0e61c9f5eb698a81832181b
font_01_sfnt_off0000d7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000efd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD2 10920 bytes
SHA-256: 725232102f2bd7ae80bfaac6e5cc1ef072f80163f9fdecfadddc4df9a09d2449